package com.tedu.day02.oop;

/**
 * instanceof 关键字-----一定是由继承-----多态---判断类是否造型
 */
class Name{}
class ReName extends Name{}

public class instanceof关键字 {
    public static void main(String[] args) {
        Name name = new Name();
        System.out.println(name instanceof Name);   //true
        System.out.println(name instanceof ReName); //false

        //继承---创建出来---关系---向上造型
        Name a=new ReName();
        System.out.println(a instanceof Name);   //true
        System.out.println(a instanceof ReName); //true
    }
}
